how to retrieve value from arraylist in string

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hi,
i m working asp.net project. i had taken class its return type is arraylist and class return arrylist with multiple values now i want use all values from arrylist so
i send mail in mail i want all value in single pls suggest me

Posted 30-Jan-12 22:00pm

Pradeep 3

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Herman<T>.Instance 31-Jan-12 4:02am

maybe it is better to show your code.

5 solutions

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CPallini · Answer 1 · 2012-01-30T22:10:00

Solution 2

The just concatenate the values, e.g.

C#

ArrayList al = new ArrayList();
al.Add(5);
al.Add("foo");
al.Add(true);
string s="";
foreach (object o in al)
{
  s += o.ToString();
}

If you have many items please consider using the StringBuilder[^] class.

Posted 30-Jan-12 22:10pm

CPallini

Herman<T>.Instance · Answer 2 · 2012-01-30T22:03:00

Solution 1

nice example on http://msdn.microsoft.com/en-us/library/ttw7t8t6(v=vs.80).aspx[^]

Posted 30-Jan-12 22:03pm

Herman<T>.Instance

Martin Arapovic · Answer 3 · 2012-01-30T22:49:00

Hi,

You can find generic solution for your case on internet.

Here is what I found:

C#

public static class ExtensionMethods 
{     
	// for generic interface IEnumerable<t>     
	public static string ToString<t>(this IEnumerable<t> source, string separator)     
	{         
		if (source == null)             
			throw new ArgumentException("Parameter source can not be null.");         

		if (string.IsNullOrEmpty(separator))             
			throw new ArgumentException("Parameter separator can not be null or empty.");         

		string[] array = source.Where(n => n != null).Select(n => n.ToString()).ToArray();         
		return string.Join(separator, array);
	}     

	// for interface IEnumerable     
	public static string ToString(this IEnumerable source, string separator)     
	{         
		if (source == null)             
			throw new ArgumentException("Parameter source can not be null.");         

		if (string.IsNullOrEmpty(separator))             
			throw new ArgumentException("Parameter separator can not be null or empty.");

		string[] array = source.Cast<object>().Where(n => n != null).Select(n => n.ToString()).ToArray();
		return string.Join(separator, array);    
	} 
}
</t></t></t>

Example of using this extension method:

C#

ArrayList myArrayList = new ArrayList();
myArrayList.Add("Item1");
myArrayList.Add("Item2");
myArrayList.Add("Item3");
myArrayList.Add("Item4");
myArrayList.Add("Item5");
	
string myListAsString = myArrayList.ToString("; ");

Output:
Item1; Item2; Item3; Item4; Item5

Pro Idiot · Answer 4 · 2012-01-30T23:21:00

Solution 4

C#

ArrayList list = new ArrayList();

// Add ypur values to the array list

foreach (string s in list)
	{
	   // Here "s" contains a perticular value from the array list 
	}

Posted 30-Jan-12 23:21pm

Pro Idiot

Updated 31-Jan-12 23:10pm

v2

Comments

Anuja Pawar Indore 1-Feb-12 5:11am

Added pre tag

Amol S. Pandit · Answer 5 · 2012-01-30T23:52:00

Solution 5

Used code like this

C#

System.Collections.ArrayList arrList = new System.Collections.ArrayList()
        arrList.Add("1");
        arrList.Add("2");
        arrList.Add("3");

        for (int i=0;i < arrList.Count - 1;i++)
        {
              Response.Write(arrList(i).ToString() + "<br>")
        }

Posted 30-Jan-12 23:52pm

Amol S. Pandit

Updated 31-Jan-12 23:12pm

v2